Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: QUAL É O DESEMPENHO DE 2012 PARA O MADRID MASTERS?
 ###Tabelas: CREATE TABLE highest-grossing_films_u.s. (highest-grossing_films_u.s._id AUTO_INCREMENT PRIMARY KEY, Rank INT, Title VARCHAR, Studio VARCHAR, Director VARCHAR, Gross VARCHAR) CREATE TABLE unsuccessful_candidates (unsuccessful_candidates_id AUTO_INCREMENT PRIMARY KEY, Rank INT, List VARCHAR, Candidate name VARCHAR, Gender VARCHAR, Religion VARCHAR, Votes INT) CREATE TABLE heat_1 (heat_1_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Athlete VARCHAR, Country VARCHAR, Time VARCHAR, Notes VARCHAR) CREATE TABLE singles_performance_timeline (singles_performance_timeline_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, 2008 VARCHAR, 2009 VARCHAR, 2010 VARCHAR, 2011 VARCHAR, 2012 VARCHAR) CREATE TABLE belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949 (belfast_and_northern_counties_railway_1848–1903__&__northern_counties_committee_1903–1949_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Type VARCHAR, Fleet numbers VARCHAR, Quantity made INT, Manufacturer VARCHAR, Date made VARCHAR, Date withdrawn VARCHAR)  
SELECT 2012 FROM singles_performance_timeline WHERE Tournament = madrid masters